Tube compressor



um., m., ff: E www@ F. S. HYATT TUBE coMPRQssoB Filed web. 452, 1921 gnou/woz I atented Atug.. l, 1924i.

FRANK S. HYATT, OF BROOKLYN, NEW YORK.

TUBE COMPRESSOR.

Application led February 4, 1921. Serial No. 442,375.

To all lwhom t may concer/n Be it known that I, FRANK S. HYATT, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Tube Compressors, of which the following is a specification.

My invention relates to the construction of tube compressor clamps designed to apply clamping pressure by means of a cam piece provided with actuating arms, said cam piece being mounted in arms or brackets rising from a suitable base and being arranged to act upon the clamping jaw.

An example of the class of device to which my invention relates is described in the patent to A.. J. Frey No. 1,217,433.

The object of my invention is to overcome a defect or drawback in the type of compressor above referred to: to wit, that there is a tendency for the compressor to come apart due to the insecure mounting of the clamping lever or cam in the arms or bracket-s of the clamping jaws.

A. further object is to overcome this objection without adding to the cost of manufacturing the compressor.

To these ends my invention consists in the improved construction of tube compressor whereby the parts are securely fastened together as hereinafter more particularly described and then specified in the claims.

In the accompanying drawings, Fig. 1 is a side elevation of a tube compressor embodying my invention and shows the jaw open.

Fig. 2 is a plan of the same.

Fig. 3 is a front elevation of the same but showing the jaw closed.

Fig. 4 is a plan view olf a modified arrangement.

My present invention is herein shown and will be described in connection with sheet metal compressors but it will be understood that it is not limited to any particular type compressor except as may be specified in the appended claims.

In the drawings 1 and 2 indicate respectively twc clamping jaws formed or connected in any desired way, as for instance they may be formed of a single piece of sheet metal provided at 4 with an opening for the insertion of the tubing to be clamped.

7 indicates arms or brackets rising from the base which carries the jaw 2 and combined with or mounted upon said base in any desired way and made of any suitable material but provided, as shown nea-r their upper ends, with openings to receive the pintles or ears 6 extending from the cam piece 5 and pivoted in said openings.

9 and 10 indicate respectively the two operating or actuating arms of the cam and which, with the cam, form the clamping lever of the compressor. The actuating arms 9, 10 permit the cam to be operated by the thumb or finger to either compress or clamp the jaw 1 or to release the same. The arms E 9 and 10 and the cam are made preferably out of a single piece or strip of sheet metal which is bent up in any desired way to form the operating arms and the cam 5 which engages the jaw 1 by its 'free end. rlhe clamping lever is also provided in the form illustrated with a strut or stay 11 to back up the cam 5 as described in prior vpatent to A. J. Frey No. 1,297,456.

ln previous forms of compressors the piece or strip of metal is stamped or cut out from a sheet of metal or blank in such form that the pintles or ears 6 extend straight out from the sides of the cam 5 and project straight'through the openings in the brackets 7. As there is more or less spring to the brackets 7, the ears 6 tend to slip out of the openings and dismount the cam 5 thus rendering the compressor inoperative. In some cases the straight ears, after being inserted through the openings, have been split and bent away from one another to hold them against slipping out of the openings.

It is the object of the present invention to cure this defect without rendering it necessary to slit said straight ears and bend the two parts away from one anothe` after said straight ears have been projected through the openings in the assembling operation.

According to one way of accomplishing the object the ears 6 instead of emanating straight from the cam 5 are inclined upward as shown in Fig. 3 thus forming the hooks which can be entered or passed through the openings in the assembling operationand which, on completion of the assembly, serve to hold the cam in place. Another way is shown in F ig. 4f 1n which a blank or strip of sheet metal is cut in such way as to form ears which project straight from the sides of the cam but are each provided with a notch 12 in which the brackets 7 seat and a shoulder 13 which prevents the ear slipping out of the opening in the bracket. As will be seen, in this case also the ears form hooks which can be projected through the openings in the assembling operation and serve, without further manipulation, to hold the cam in place.

In both cases the piece or strip of sheet metal from whichv the cam isv formed is cut out or stamped with ears 8 which are so initially formed on the blank of such shape that a recess is formed in which the bracket seats andas theportion of the ears which projects beyond the opening in the brackets intersects the periphery of the opening, the cam is securely held to the bracketsthat is av comparatively slight pressure outwardly on the brackets will not free the cam from its pivotal support as is the case when the ears 6 are formed as in the prior art.

As no additional operation or labor is necessary to form the ears according to this invention to that required in the previous forms, no increase of cost attends the use ofthe present improvement.

It will be seen that by the foregoing construction there is provided a positive means which prevents the spreading of the cam holding brackets; that in both Figs. 3 and 4 when the clamping members are in tube compressing position the cam is forced upwardly with respect to said brackets and that said brackets can not be forced apart without first riding over the hooked ears, which can not occur since the upper clamping member acts asa spring to force these ears upwardly. It will also be seen that in the construction 'shown in Fig. 3 the decided incline of the hooked ears tends positively to draw the brackets toward each other.

What I claim as my invention is l. In a tube compressor, the combination of upper and lower clamping .members, brackets rising from opposite sides of one of said members and an operating cam en` gaging the other member and having rigid ears pivoted in Xed position in openings in said brackets, said ears being stamped out of the sheet metal of the cam integral therewith and ofl a form adapting them of upper and lower' Without bending to act as hooks on being entered in said openings in the assembling operation.

2. In a tube compressor, the combination of upper and lowerl clamping members, brackets rising from opposite sides of one of said members and an operating cam engaging the other member and having rigid ears pivoted in iixed position in openings in said brackets, said ears being stamped in the form of hooks from the sheet metal of the cam and integral therewith and which on being entered on assembly in said openings will hold the cam in place.

3. In a tube compressor, the combination of upper and lower clamping members, brackets rising from opposite sides of one of said members and an operating cam engaging the other member and having rigid ears struck up as hooks from the sheet metal of the cani integral therewith and pivoted in fixed position in openings in said brackets, said ears operating on being hooked into said openings on assembly and without bending to hold the cam against displacement.

et. In a tube compressor, the combination of upper and lower clamping members, brackets rising from opposite sides of one of said members and an operating cam engaging the other member and hai/'ing rigid ears pivoted in fixed position in openings in said brackets, said ears being initially formed on the cam with an upward inclination permitting them to be entered after formation in the openings and thereafter to act as hooks to hold the cam against displacement, as and for the purpose described.

5. In a tube compressor, of upper and lower brackets rising from opposite sides of one of said members and having openings therein, an operating cam engaging the other member, said cam having hooked ears inserted in said openings, said hooked ears being adapted under the action of one of said members to force said brackets toward each other in the clamping act.

6. In a tube compressor, the combination of upper and lower clamping members, brackets rising from opposite sides of one the combination clamping members,

of said members and having openings therein, an operating cam engaging the other member, said cam having hooked ears adapted to be inserted in said openings in the assembling operation and adapted in their original form, under the action of one of said clamping members, to prevent spreading of said brackets.

7. In a tube compressor, the combination clamping members, from opposite sides of one members and having openings brackets rising of said llt) therein, an operating cam engaging the revisie ri other member, seid cam having hooked ears members are in tube compressing position. stamped out thereof '1n the same plane Signed at Brooklyn in the county of 10 therewith and adapted to be inserted axially Kings and State of New York this 2d day through said openings in the assembling of February A. D. 1921.

operation, said ears being adapted, in their FRANK S. HYATT. original form, under the action of one of Witnesses: said clamping members, to prevent spread- ETHEL B. HALLER,

ing' of said brackets When said clamping HAZEL BRILL. 

